Please use this identifier to cite or link to this item:
https://hdl.handle.net/10356/96995
Title: | Impurities in zone-refining anthracene crystals | Authors: | Hong, Irvine Huamin Tan, Ke Jie Toh, Minglin Jiang, Hui Zhang, Keke Kloc, Christian |
Issue Date: | 2012 | Source: | Hong, I. H., Tan, K. J., Toh, M., Jiang, H., Zhang, K., & Kloc, C. (2013). Impurities in zone-refining anthracene crystals. Journal of crystal growth, 363, 61-68. | Series/Report no.: | Journal of crystal growth | Abstract: | Over the past five decades, paramount interest had been given to the synthesis of single crystals for use as scintillators in nuclear radiation detection field. Organic semiconductors are in principle less costly and of light weight, providing real potential as improved radiation detectors. However, challenges remain in the crystal growth and purification of the neutron detection material whereby the residual impurity will result in formation of excitation trap quenching the light yield within the host crystal. In this study, single crystals of anthracene up to 10 cm had been grown from the melt based on a self-designed, inexpensive and versatile zone refining apparatus. Platelets cut from these crystals by applying wire saw were tested for purity and perfection by Powder X-ray Diffraction (XRD), Laser Desorption Ionization-Time of Flight Mass Spectrometry (LDI-ToF MS), Fourier-Transform Infrared Spectroscopy (FT-IR), Atomic Force Microscopy (AFM) and fluorescence measurement. The results of characterization studies revealed that impurities within commercial anthracene powder such as carbazole and 9,9′bianthryl have been reduced effectively as indicated by LDI-ToF MS analysis. Meanwhile the photoluminescence analysis had clearly demonstrated higher photon energies derived from the pure crystal as compared to those of commercial material with higher content of impurities where free excitons during their localization surrender part of its energy to the surroundings. | URI: | https://hdl.handle.net/10356/96995 http://hdl.handle.net/10220/11693 |
ISSN: | 0022-0248 | DOI: | 10.1016/j.jcrysgro.2012.10.002 | Rights: | © 2012 Elsevier B.V. | Fulltext Permission: | none | Fulltext Availability: | No Fulltext |
Appears in Collections: | MSE Journal Articles |
SCOPUSTM
Citations
20
22
Updated on Jan 23, 2023
Web of ScienceTM
Citations
20
20
Updated on Jan 24, 2023
Page view(s) 20
559
Updated on Jan 28, 2023
Google ScholarTM
Check
Altmetric
Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.